Using cutting-edge scientific and technological advances, Investigation Discovery re-examines some of the most controversial mysteries of our time in each episode of this popular series. Find out what really happened to TW... more &raquoA Flight 800, and learn the truth behind Roswell, Big Foot and so much more through rigorous tests that employ the BEST EVIDENCE available today. Includes episodes: TWA Flight 800 In 1996, TWA Flight 800 exploded shortly after take-off, apparently when a spark ignited jet fumes. But some eyewitnesses claim they saw a rocket or missile strike the airplane. A major explosive test could settle the dispute once and for all. Big Foot Examine this legendary creature's form, posture and gait frame-by-frame against the movements of an actor portraying the beast. The results will surprise even the most skeptical viewer. Chemical Contrails In this episode, technicians examine samples from jet aircraft vapor trails to get to the heart of the question - what is in those fuel emissions, and what causes them to linger for hours and link up with one another like a ghostly blanket that seems to affect weather - and perhaps our health? John Wayne's Death When lifelong smoker John Wayne died of cancer in 1979, most believed it was smoking that killed him. But some experts say that his cancer may have really been caused by radiation exposure from nuclear fallout lingering on the set of The Conqueror. Investigation Discovery probes Hollywood history to find the truth. The Roswell Incident Believers claim that an unidentified flying object was found on a ranch near Roswell in 1947. A film purported to be a military record of an alien autopsy has been discredited; however, the debris of the supposed flying saucer is a matter for serious examination. Cattle Mutilations All over the world, it's the same disturbing story: Cattle that were in perfect health are found dead and mutilated in their pastures. Parts of the animals are missing - bored out and removed with almost surgical precision. Who or what is behind these disturbing acts?&laquo less